Machine for making paper bags.



J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED JULY17| 1913.

Patented M2117 1916.

I6 SHEETS-SHEET I.

\1 r r ad P v a A {g l J CHE 1 I w w J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION men JULY 17. I913.

' Patented Mar. 7, 1916.

16 SHEETS-SHEET 3.

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me COLUMBIA PLANOGRAPH co., WASHINGTON, D. C.

J. BARDET. MACHINE'FOR MAKING PAPER BAGS.

APPLICATION FILED JULY 17: 1913- 1,174,040. Patented Mar. 7,1916.

l6 SHEETS-SHEET 4- THE COLUMBIA PLANOQRAPH 510., WASHINGTON, D. C.

.l. BARDET. MACHINE FOR MAKING PAPER BAGS. APPLICATION FILED JULYH. 1913.

1,174,040. I Patented Mar. 7,1916.

16 SHEETS-SHEET 5D J. BARDET.

MACHINE FOR MAKING PAPER BAGS. APPLICATION F ILED Jun/11. I913.

THE COLUMBIA PLMjDGRAPl-l cm. WASH Patented Mar. 7, 1916.

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1. BARDET/ MACHINE FOR MAKING PAPER BAGS.

16 SHEETS-SHEET 1.

Patented Mar. 7,- 1916.

APPLICATION FILED .IULYIT. 1913'.

J. BARDET.

MACHINE FOR MAKING PAP ER BAGS.

APPLICATION FILED JULYH. 1913.

' Patented Mar. 7,1916.

16 SHEETS-SHEET 8- elf I. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED JULYIYI I9I 3- Patented Mar. 7, 1916.

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Z5 72:6 flwne gar THE COLUMBIA PMIfIOGRAPI-l co., WASHINGTON, n. c

J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED IULYi? 1913. 1, 174,040. Patented Mar. 7, 1916.

16 5HEET$--$HEETI1- THB COLUMBIA PLANOORAPH 90., WASHINGTON. D. C.

J. BAR DET. MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED JULYH. 1913- 1,1'74.,040. Patented Mar. 7,1916.

16 SHEETS-SHEET I2.

THE COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c.

J. BARDET.

' MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED JULYH. 191a.

Patented Mar. 7, 1916.

I6 SHEETS-SHEET 13- fig. 25'.

THE COLUMBIA PLANOGRAPH (0., WASHINGTON, u. C.

J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION man 1uLYn. 1913.

1,174,040. Patented Mar. 7, 1916. I

I6 SHEETSSHEET l4.

J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED JuLYH. 1913.

Patented Mar. 7, 1916.

16 SHEETSSHEET15.

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. M Ex Jean/347 5565.

THE COLUMBIA PLANOOIAEH .00., WASHINGTON, D- C J. BARDET.

MACHINE FOR MAKING PAPER BAGS.

I APPLICATION FILED JULYH, 1913.

Patented Mai. 7, 1916.

T6 SHEETS-SHEET 16- IMM- THE COLUMBIA PLANOGRAPH co., WASHINGTON D. If.

onnro.

JEAN BABDET, OF PARIS, FRANCE, ASSIGNOR TO DOBSON, ,MOLLE & CO., LIMITED, 01: EDINBURGH, SCOTLAND, A. LIMITED COMPANY INCORPORATED UNDER THE BRITISH COMPANIES ACTS, 1862 TO 1898.

MACHINE FOR MAKING PAPER BAGS.

Application filed July 17, 1913. Serial No. 729,580.

therefore be provided with any desired printing or decoration before enteringthe machine.

The improved machine is capable of making paper bags of two different kinds,

' namely, bags having square or rectangular bottoms, and bags having hexagonal bottoms, and also of making each of those kinds of bags in different sizes by simply changing and leaving out some of the tools.

The improved machine comprises essentially two sets of folding and pasting apparatuses arranged at fixed points around two plates or drums rotating on horizontal axles for conveying the paper sheets successively to the said apparatuses. The first drum is provided with folding appliances constructed in accordance with my earlier British Patent No. 22818 of A. D. 1912, for forming the sheets into tubes folded lengthwise.

' These tubes are then conveyed by automatic means upon the second drum where they are subjected successively to the action of the appliances of the secondset of apparatus which form the bottoms of the bags by a series of suitable folding and pasting operations.

The present invention consists more particularly in the combination of apparatuses suitable for folding lengthwise rectangular sheets of paper previously cut to length for the purpose of forming them into fiat tubes then by means of suitable apparatuses shaping one end of the said tubes to form the bottoms of the bags.

One construction of the improved machine is illustrated by way of example in the accompanying drawings in which Figure l, is a front elevation of the improved machine, with certain portions omitted or illustrated diagrammatically. Fig.

Specification of Letters Patent.

Patented Mar. 7, 1916.

1, represents a prolongation of the structure shown in Fig. 1, the junction line 'bemg shown at MN. Fig. 2, is an end elevation of the machine with certain portions omitted or illustrated diagrammatically.

Figs. 3 and 4 are vertical sections of an apparatus for folding a paper sheet into the.

form of a flat tube. Fig. 5 is an elevation of an apparatus for forming re-entering folds in. two sides of the tube. Fig. 6 is a diagram of a folding apparatus mounted on one of the drums of the machine. Figs.

7 to l f illustrate successive stages in the formation of a paper tube for use in'the manufacture of a paper bag with a square" bottom. Figs. 15 to 21 illustrate'the successive stages in the formation of the square bottom of the bag. Fig. 22 illustrates a flat bag with a hexagonal bottom. Fig. 23, is

a view in elevation; partly in section, of the second drum of the machine. Fig. 23,

is a prolongation of the structure shownin Fig. 23, the junction line being shown at OP. Fig. 24, is a vertical section of the second drum, taken at right angles to Figs.

23 and 23. Figs. 25 and 26 are respectively an elevation and a plan of an apparatus for effecting the first stage in the folding of the bottom of the bag. Figs. 27, 28 and 29, are respectively an elevation, a partial vertical section, and a plan of an apparatus for effecting thesecond stage in the folding of the bottom. Figs. 30 and 31'are respectively an elevation and a plan of an apparatus for effecting. the third stage in the folding of the bottom. callsection of a pressing plunger. and 34; are respectively a vertical section and a plan view of one of the clips on a larger scale. s

A and B indicategenerally the two drums of the machine which, are mountedon two 3 shown only in part. These drums are caused to rotate intermittently by means of two cams 4 fixed on a cross shaft 5. These cams drive rollers 6 arranged in circles on Fig. 32 is a verti Figs. 33

two plates 7 and 8 fixed on the shafts 1 and 2. The grooves of these cams comprise The drum A carries-aset effolding ap paratuses of the kind described in my aforesaid patent, for which reason they are shown here only in a diagrammatic manner (Figs. 1, 2 and 6). Each of these two apparatuses comprises two movable blades 9, 10, mounted slidably on supports 11 which are carried by oscillating parallel arms 12, 13; in such a manner as to be capable of executing semi-circular translation movements. These blades sharing these said movements while remaining parallel to one another, are also capable of being moved on their supports at right angles to their planes by means of slides 14:.

The oscillating arms are mounted on axles 15 fixed to the plate 16 of the drum 4 and are actuated by means of toothed sectors 17 gearing with pinions 18 fixed to the hubs of the arms 12, 13. These sectors 17 are carried by a. crank shaft 19 mounted in the plate 16 andthey receive oscillatory motion from a cam (not shown). The supports 11 also carry pressing arms 20, 21, mounted so as to be capable of moving away from and nearer to the blades9, 1O laterally to the latter for the purpose of allowing the paper sheet a (which is to be folded) to be placed in position. The arms 20, 21 are also capable of movement at right angles to the plane of the blades for the purpose of gripping and re leasingthe paper sheet. The means for actuating these arms, the constructional details of the blades and of their supports and the means for actuating these parts are not shown, since they are known and do not form part of the present invention.

Various devices carried by the framing of the machine are arranged at b, 0, and (Z around the drum A. The first device has the function of bending by means of blades 22 the sheet 0. around the blades 9, 10 when the latter are in one and the same plane, in such a manner as to form a flat tube (Fig. 8). The seconddevice serves to form by means of blades 23 reentering folds in two opposite sides of the tube, for which purpose the blades 9, 10 are caused to face each other and are moved toward each other while the blades 23 are pushed between them (Figs. 2 and 13). The third device (not shown) consists of tongs movable in the axial direction of the drums for the purpose of conveying the paper tubes from the drum A on tov the drum B, if desired, the framing carrles at p, a devlce which 1s simllar to that at I), and which serves for folding around the blades 9, 10 a paper sheet intended to form a lining for the interior of the bag.

lution of the cams 27- the parts 28 rise and fall and cause the sectors 33 to rock in such a manner as to compel the pinions 38 and the blades 22 to make half a revolution alternately in one direction and the other. hen these blades 22 are turned outward, a pair of blades 9, 10 supporting a paper sheet a pre viouslygummed on one edge passes down between them so that the sides of the sheet are folded down. At this moment the blades 22 rotate in the direction of the arrows c (Fig. 3) and cause the sides of the sheet to rise against the lower face of the blades and to be stuck to each other so as to form a flat tube having two folds a (Figs. 7 and 8). At this moment the pressing arms 20, 21 bear against the opposite sides of the said tube and keep them in place on'the blades 9, 10 (Fig. 9). Then the blades 22 return into their initial position while the above blades 9, 10 carried along by the plate 16, advance in the direction of the arrow f (Fig. 2), and the following blades 9, 10 carrying a fresh paper sheet, engage in their turn between the blades 22.

The feeding of the sheets a on to the blades 9, 10 at Z) may be effected by means of any suitable means, for instance marginal devices of the usual type employed in printing machinery. Similar devices may also be provided at 79 for feeding lining sheets when such are used.

For manufacturing bags of different widths the blades 9, 10 are mounted in a removable manner on their supports 11 and can be replaced by wideror narrower blades. Further the supports 35 may be moved apart from or nearer to each other being for this purpose mounted to slide on a frame 36; they are held in position by a right and left hand screw 39 which merely needs to be turned to move them in opposite directions. The horizontal grooves in the parts 28 are sufficiently long to allow the slide blocks 30 to move freely in them whatever the distance between the supports 36 within the limits provided for.

During the passage of a paper tube from .7) to c this tube is subjected to a second folding in a manner described in my earlier British Letters Patent No. 22818 of A. D. 1912, by means of the relative movement of the blades 9,10 each of which is caused to occupy the place ofthe other by a semi-circular translation movement (Figs. 10 and 11). This movement of the blades 9, 10 is followed by a rearward movement of a quarter revolution so that on arriving at 0, these 1 blades are situated one in front of the other 5) comprises two supports 40 which carry the blades 23 and which are mounted to slide on a fixed frame 41 so that they can be moved nearer to and also away from each other. These supports are connected by joints 42 to bell-crank levers 43 fulcrumed on the frame ll and actuated by means of a T-shaped part 4.4. The latter part is movable in slideways l5 in a direction at right angles to the movement of the supports 40 and is actuated by a continuously rotating grooved cam 46 so that at each revolution of a the tube at the same time as the latter is be ing flattened (Fig. 13). l/Vhen the blades 23 are moved apart, the drum A revolves through a further angular distance and the following tube having the form of a square prism, is fed in its turnbetween them. When the folded tube has arrived at (Z, being still held in the flattened state by the blades 9,

10 it is seized by tongs (not shown) and pulled on to the drum B, This drum (Figs.

a tendency to press them against the plates 48. They can be moved awayfrom these plates by means of a cam 52 rotating around the shaft 2 for the purpose of enabling the tubes to be placed upon the drum B and allowing the finished bags to pass out.

Facing the drum B the machine framing is formed with a polygonal portion 53 upon the facets of which are mounted a series of devices 9, h, i, j, is, Z, for shaping the bot toms of the bags and then ejecting the bags on to an endless conveyer 5a.

The device 9 (Figs. 25 and 26) comprises essentially two symmetrically arranged pairs of blades 55, 56, the blades of each pair befolded paper tube a and are preferably slightly oblique to thelongitudinal axis of the said tube. 5

Theblade 56 is fixed on the axle, 57 and can be turned through half a revolution by means of a rack 63 which gears with a pinion 64 fixed on the axle 57 and which slides in a sleeve 65 fixed to the chair 60.

In addition to the movements derived from the to-andfro motion of the chairs in their slideways 61 and of the racks 63 in their sleeves, the blades 55, 56 receive also motion at right angles to the plane of the tube a due to the to-and-fro motion of the framing 62 along a slideway 66 which is fixed rigidly to the part 53 of the framing of the machine. The weight of the framing 62 and the parts carried by it is balanced by a spring indicated in dotted lines.

Before describing the mechanisms that produce these various to-and-fro movements I shall proceed to set forth their effects. The raising of the. framing 62 with the blades and other parts carrried by it allows the tube a to pass under the blades when the drum revolves. opposite the device g, the framing 62 moves 7 down again, and the blades 55, 56 which are lVhen a tube a is brought suitably moved apart assume positions on opposite sidesof the bag as shown in dotted lines in Fig. 26, The movement of the chairs 60 toward each other has then the result of causing the blades 55, 56 to enter the reentering angles constituted by the folds a a a these'blades are at this moment placed one upon the other. When these blades have thus reached the bottom of the folds a their points 58 are situated near each other and near the front edge 67 of the frame 49 that keeps the tube on the plate L8 (Fig. 15). Then on the blades 56 being made to make a half revolution in the direction of the arrows m (Fig. 15) they will compel the upper surface of the tube to fold on to the frame -19 so as to form a fold a" around the edge 67 at the same time that the folded. sides of the tube are set up so as to form around the edges 58,59 folds a and a along the diagonals of a square. The end portion of the tube constitutes at this moment a sort of square box having faces a and a The formation of this box is accomplished by the introduction of a square man.- drel of suitable form mounted on the fram ing 62. This mandrel is provided on its sides with elastic blades 68, 69 the lower portions of which are curvedinward while the upper portions are fixed to a'plate -70 fixed to a sleeve 71 sliding in a sleeve 72 fixed to the framing 62. A rod 78 extending through the interior of the sleeve 71 carries a square plunger 74 whose sides bear against the blades 68, 69; A spring 7 5 has a tendency to keep the plate 70 bearing against the plunger in such a manner that the ends of the blades 68, 69 shall be situated underneath the said plunger. Then on depressing this plunger upon the box a a the inwardly curved blades will engage readily therewith and on their coming to rest near the bottom of the box owing to the upper edge of the sleeve 71 striking the sleeve 72, the spring 7 5 will yield and the plunger continuing its descent will compel the blades to assume an erect position and form the side edges of the box atthe same time as the lower edges of the plunger form the bottom folds a a When the box a a has been formed in this manner, the mandrel is raised, the blades 55, 56 having been withdrawn to the sides and then raised sufficiently to allow the box to pass underneath and the blades 56 are turned down again on to the blades 55. In order to produce these various movements the movable framing 62 carries a cam shaft 76 which receives continuous rotation from a fixed shaft 77 by means of helical gear wheels 78, 79 one of which is slidable on the shaft 77 and the other isfixed on the shaft 76. The to-andfro inotionof the framing 62 along the fixed slideway 66 is produced by means of a rack 80 fixed to the latter and over which a pinion 81 mounted on the framing 62 is arranged to roll. The rotation of this pinion is produced by a toothed sector 82 which is mounted on the framing 62 and is actuated by the cam 83 of the cam shaft 76.

The to-and-fro motion of the suspended chairs is produced by means of lever 84 fulcrumed at 85 on the framing 62 and actuated by other cams 86 on the shaft 76. The to-and-fro motion of the racks 63 is produced by two cams 87 which actuate through levers 88 two slide blocks 89 working in slideways 90 fixed to the framing62. These slide blocks carry slideways 91 which are parallel to the slideways 61 of the chairs and in which work slide-blocks 92 fixed to the cracks 63. By these means the to-andfro motionof the slide blocks 89 is transmitted tothe racks 63 irrespectively of the mutual nearness or distance apart of the pairs of blades 55, 56, and the to-and-fro motion ofthe chairs 60 in their slideways 61 has no effect upon the actuation of the racks 63 nor consequently upon the rotation of the blades 56. The rising and falling motion of the plunger 7 4 is produced by means ofa bell-crank lever 93,94 actuated by a cam 95 likewise fixed on the shaft 76. This manner of actuation makes the device 9 a The apparatus it has thefunction of zip-- plying to one of the surfaces a of the paper box a'drop. of paste for connecting it later on to the opposite surface a it also serves for introducing, if necessary, into the bot tom of the box a square of cardboard n for reinforcing the bottom of the bag. For this purpose an arm 96 carried by a shaft 97 (Fig. receives oscillatory movement which brings a roller 98 mounted on its movable end into contact alternately with a paste roller 99 and the surface a of the paper bag. The paste contained in a trough 100 is conveyed to theroller 99 by a roller 101 revolving in contact therewith. The mechanism for oscillating the arm 96 and revolving the rollers 99 and 101 is not shown.

The apparatus 72. comprises further a device for distributing pieces of cardboard comprising a fixed table 102 on which slideways 103 guide a slide 104 having an alternating movement. This slide has a thickness equal to that of a piece of cardboard and at each stroke pushes back the bottom piece of a pile of cardboard pieces n which are situated loosely between verticalguides 105. The cardboard piece which is thus pushed back drops between the four blades 106 of a squaremandrel similar to that of the apparatus g, one of these blades has a slit for the passage of the cardboard piece pushed by the slide.

The plate 108 carrying the blades 106 is supported by a sleeve 109 guided in a sleeve 110 fixed to the framing 111 of the table 102; it is normally kept pressed by a spring 112 against a plunger 113 whose rod extends inside the sleeve 109 and is connected to an actuating lever 114. Continuously rotating cams 115 drive levers 116 and 117 connected respectively to the slide 104 and the lever 114. At the moment when the plunger 113 is at the top of its stroke a cardboard piece a is pushed under it by the slide and is held by friction between the blades 106. The tube a being brought under the mandrel with the aperture of its box (17, a uppermost, the lever 114 descends so that the blades 106 whose lower parts are incurved, engage in the box, and when these blades are stopped by the contact between the upper edge of the sleeve 109 and the sleeve 110,

the plunger 113 will continue to descend compressing the spring 112, and will force the cardboard piece a between the blades 106 until it drops to the bottom of the box. The plunger and the blades are then raised while the slide 104 moves behind the next following cardboard piece 7%.

The application of the drop of paste by the roller 98 takes place while the mandrel is engaged in the box a a and is supporting the sides of the latter. The tube a on arriving at i is subjected to the action of blades 118 and 119 (Figs. 27, 28, 29) serving to fold the sides of the box a? a down on to its bottom and one upon the other. These blades are jointed to supports 120 which 

